public class Lendemain { private int annee; private int mois; private int jour; private static int[] JOURS_PAR_MOIS = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; public Lendemain(int annee, int mois, int jour) { this.annee = annee; this.mois = mois; this.jour = jour; } public String toString() { return String.format("%04d-%02d-%02d", annee, mois, jour); } public Lendemain lendemain() { int newJour = this.jour + 1; int newMois = this.mois; int newAnnee = this.annee; if (newJour > JOURS_PAR_MOIS[this.mois - 1]) { newJour = 1; newMois++; if (newMois > 12) { newMois = 1; newAnnee++; } } return new Lendemain(newAnnee, newMois, newJour); } public int compare(Lendemain autre) { if (this.annee != autre.annee) { return Integer.compare(this.annee, autre.annee); } if (this.mois != autre.mois) { return Integer.compare(this.mois, autre.mois); } return Integer.compare(this.jour, autre.jour); } public static void main(String[] args) { Lendemain date = new Lendemain(2024, 2, 28); Lendemain lendemain = date.lendemain(); System.out.println("Date actuelle : " + date); System.out.println("Lendemain : " + lendemain); //test Lendemain autreDate = new Lendemain(2024, 3, 1); System.out.println("Comparaison : " + date.compare(autreDate)); } }